The existence of minimal immersions of 2-spheres by Sacks and Uhlenbeck
Topology of three dimensional manifolds and the embedding problems in minimal surface theory by Meeks and Yau
The classical plateau problem and the topology of three-dimensional manifolds by Meeks and Yau
The existence of embedded minimal surfaces and the problem of uniqueness by Meeks and Yau
Least area incompressible surfaces in 3-manifolds by Freedman, Hass and Scott
Sur les 2-spheres d'une variete de dimension 3 by Laudenbach
Danny Calegari's notes on minimal surface
Finite group actions on 3-manifolds by Meeks and Scott
Homotopy and isotopy in dimension three by Hass and Scott